Flash trimming machine



` Dec. 14, 194s.

Filed Jan. 31, 1944 l A. H. LEWIS FLASH TRIMMING MACHINE 3 Sheets-Sheet 1 INVENTOR. ALFRED H. LEWIS BY Mmm @Jb/#ML ATTORNEYS Bec. 14, 1948. Y A. H. LEwls l2,456,432

FLASH TRIMMING MACHINE Filed Jan. 3l. 1944 I f t 3 Sheets-Sheet 2 INVENTOR.

ALFRED H. Lswl s ATTORNEYS A. H.- LEWIS Dec. 14, 1948.

Filed Jan. 31, 1944 FLASH 'TRIMMING MACHINE 3 Sheets-Sheei' 3 ALFRED H. LEWIS t ATTORNEYS Patented Dec. 14, 1948 y @UNITED Stmas cnr-aaai' -iovFfFioE 12,456,432, 'I i, 2 FLASHHRTMMINGMAGXHNE .Alfred 'I-. LeWis',.llIIuntingtoxxiwoods, gMich., as-

troit, lvlic'h.,V a corporatonf Michigan i Application. January 31, 19;44.,5Serial. No.352'0 ,57116 y* 4 `lljlaims. (0142.125433) The ,invention ,relates to rflash `trimming .maand isfcomposedwoi; aeserfies of A.segments .Ef @conchines such, for -instance, .asare Aused xforthe nected linksfFtol-the Ahead-D.l lThefirnfrer removalof the flash .Troma-Weld. surraices of the lsefgments .are inclined to 'engage ..It ,is the vobject of .the invention to Aobtain@ a -.conrepondingly inclined expanding head' 5G construction which .will completely removethe n .-latters axially movable ,with :respect .t0 flash..without danger of .cutting into.anyporti.on therheadDzand .hasqazoylindrical'shank .vH slidof the surf-ace of thefarticle. It isa'furtherobject able therein. On thefmear iside-.et-theportion iB to utilize themechanism .for removing the flash is ia head-Lhaving formedlther-:ein fa, 'hydraulic toaccomplish the .further .function of sizing and cylinder J :and V"the pistonv J ,in fthis V c-ylinders circularizing the Workand with these` objects in H connected -Joy ar-.rod J2 with .thefshank H. '.Thus, view the invention consists in the construction as hydraulic pressure fafpplied'fto litl-ie inside-lof @the hereinafter set forth. V Y pistonf'J'==Will.:actuate`thefshank vlL-I:andfl'iead..'Gr

In the drawings: toweagpand-t-hejawse of ftheclamp E. Fig. `1 is a longitudinal central section through The:franneeAlhas:aipontionAextending.above thel machine; l5 Vthe .fannular `portion #B forming lspaced p'aral-lel `FZ is aifront elevation; guideways A2 for a vertically movable head Fig. -3 Ais a rear elevation; This :head'has .-:guideways -K therein extending Fig. 4 is a. horizontal section on lined-ltigjl; longitudinally :in ha 1jhorizontal plane and frat fa Fig. 5is a'vertical section on line 5`5,`"Fig.`4; small iangle .-to :the axis -.of thei-head D. In "the Figg is Aa sectionalpplan View of a modification :20 .guidewaysK' aref'slidesfLland -TL' yfor 'carrying illustrating the shearingcutters; and the'fouerlappingfishearingfbla'deszM z-a'ndlvllv The 'Figs. 7 'and8 are, respectively, a central longiblade:Mrisrfashioned'.toca` contour :corresponding tudinal section and-an end elevation "of a modije'd to". a fzcylindricalportionl'N' of ithe frimj N rand construction of machine. also the flange portion N2 thereof. The blade Certain Welded structures such, for "instance, M :correspondsttoitheoylindricalzgportion ,"Nand astire receiving `Wheel -rims have^ash 'extending iiheioppositezange NSN Thus, if ,there lis fany completely Yaround-the cross sectional contour. variatiun'inithefworkiwith.respectftosthedistance 'On'the inner side of the rimthe'surface adjacent 'betweenzxthe ilanges N2 4andfN3,'thebladest.Mand to the flash is concave Whereas the'outer surface Mare adjustable :to 1:cormensatetherefor: :To is convex. -There are 'also rim `flanges around 30 hnld:tlre:blades::M'andLM' nicontactrwithfall por- Which the flash extends'of a'curved'cross sectional .tions "f dhefiexternalzcontour .of' the "rim,I:have lcontour. To completelyvremove -this vh'flash-the Anarra/fidati'resilientpressure:meansfpreferalolythyshea-ringtool must conform to the lcross sectional draulic'emotors'fnperatingon ilow., pressure. #.One contour v'but there Will :be =a rcertain amount --of .oftheselhydraulic.motorsincludesra cylinders@ variationlin the :work-xsothatone form o'fshearv35 mountedzonthexupper end I.of-the portion :.AUof 4ingblacle willnottaIlr-ims. I have,itherefore, rthefgrame'in with y:the :piston 1.0' of :this @motor devised azconstruction in `which theshearing' blade connected '.bypza :rod w02 Wit-h'.l the "head The is vformed of .afpluralityof overlapping :sections rod O2 also extends upward above-the cylinder Whichrarerelatively movable mtofexa'ctconform- O .landrhas a threaded portion ,O3 :forengaging 'ity tofdi'fferent 'portions .foi the-.fcontoun 'While 40 :an zadustable:-'stop=|4which limitsthe downward itiis:possibletosimultaneously remove .thela'sh movement o ff:the;lneadwK. The 4slides LfandLf :from laothith'e.inner androuter'sidesofthe rim areffconnectedxby"rods vPeandsiP *with pistons vin incaistngle machine, l'have foundlit-zdesirable^`zto hydra-1.1,licticzvllnders @-PZ and 1 P/ :for "respectively 'periorm..;these Vtwo .operations .'successively vand ipressin the bladesMtandM'pagainstltheflanges in. separate macines. "Thislfacilitates enotion'ly 45 :Nfiand.V .offtile-:finiA '-Ilh'us;-thez combinedzaetion the. holding ofithef-iiimfduring the cuttingropera- :ciithefmylindersvQPZ;andfP3:is torholdthe blades 'tion :but ,falso Arthe simultaneous :circularizing of .Mv-andMiagainst '.thecontour oft the rim suriace. the same. Thesshearing bladesi-M zandfiM'wbeing -pr-.efier- .,-IndetaiLAiszafran-ie'Whiohis.proyidedwvithxan ably arranged at an angle to the axis of the head annular portionzBzinwhich `.isiia.':bearingbushing 5 4fvvillfbe:atgafcorreslzlondingangleto thefflashfon 'C fortan oscillatory :cylindrical head D. Mounted ith-,e frim softhatftduringthe shearingfoperationthey at One end-lof ftherheadzD Iisza circularzing-tclmick `will famove progressively along said fflash. @The :E for engaging i a Wheel .rim. p Thisgchuckm avbe .shearingiis .accomplished :abyea --slightfrotation of arranged eitherinside orfoutside thelrimibutgras .theheadlb withinffthebushing.Cxandithismovespeeicauyfshown in ings. .q1 .to arisen-the inside 55 .menuisobtamemmougn anydmuueeynndem@ head D to the rim chuck E.

Operation y The rim'N is i',r-ansierred directly" from the welding machine onto the chuckE while in its collapsed position after which a movement of thel head G under actuation of the piston J will ex-^- pand the chuck to engage the rim and circularize the same. The fluid pressure in the cylinder O will press the shearing bladesMfand M. in contact with the cylindrical portion of Vtherirn` and the pressure in the cylinders P2 and?3 will hold same blades against the anges N2 and N3.` Fluid is then admitted into the cylinder Q towrotate the clamped rim about its aXis which will shear 01T the flash on the outer surface of the rim.

Asshown in Fig. 6 the blades M. and Minstead of contacting Iat one time with the full length of the ash will on account of the angle at which they are set, progressively shearfthe flange from one end to the other. However, this is not essential, as the trimming might be "performed with blades parallel vwith the flash'. f i

While the blades comeinactual contact with the surface of the work,V inorderto trim the iiash and'form a' continuation of'sa'id surface, it is desirable vto avoid any' danger of the trimming edge cutting below said surface. I therefore pref erably provide 'the slides L and'L with contact ribs L2 for bearing against the surfaceof the work and limiting inward movementof the cutting blades. v

As above stated, I preferably'provide separate machines for trimming the flash fromthe outside and from the inside 'of the annular work. As thus far described, the machine designed to trim onlythe outside flash, but in the construction shown inFigs. 7 and 8 the machine is designed to trim the ash from the inside'of the rim. i

As illustrated, the frame R annular portion R for holding :a revoluble chuck supporting member S. The 'chuck 'is formed' of a series of segmental jaw members S'f for engaging the external surface of the work'suchas therim N. These jaw members are simultaneously moved the inner surface of the work, and stop ribs W3 limit any further movementof said blades. vThe chuck supporting member Si isrevolved-through a small segment by the operation of a hydraulic cylinder'Yconnected with an arm Y on said member S. v

' The operation of this modied construction is essentially the same as that of the construction first described.` There is, however, this dierence: that in the modified form the work is externally chucked and is circularized by radially inward pressure'of the jaws, Iwhereas in the rst isl` provided with an extending described construction the chuck engages the inside of the work. In both constructions the path of movement of the shearing blades is concentric with the common axis of the chuck and rim So that the surface produced by the trimming oir of the flash is in alignment and a continuation of the surface adjacent thereto. Both machines are adustable to diiferent diameters and thicknesses of rims, aswell as to variations in the width thereof` In the manufacture of Wheel rims and other like annular articles, it is necessary to perform a sizing operation which will compensate for any v inequalities in the welded rims. H flash removing machine accomplishes this sizing My improved and circularizing of the rim by the means employed for holding the work during the flash removing operation. Therefore, the need of a separate mechanism for sizing and circularizing the productv is dispensed with. In brief, I perform the two operations in a single machine.

What I claimras my invention is:

1. A flash shearing machine comprising a frame, a rotary head mounted therein, an expansion chuck mounted at one end of said head and adapted to engage and circularize an annular work member to expose the outer ila-sh bearing surface thereof, means for expanding said chuck, a viiuidrnotor mounted on said head for operating said expanding means, a shearing cutter formed of a plurality of overlapping .sections conforming to different portions of a cross contour of the exposed surface of the work, slides for holding the respective sections in contact with the work surface, a cross head mounted on said frame to be vertically adjustable with respect to the work and having guideways for said slides, iiuid pressure means for moving said slides to hold said cutter sections in contact with Ithe adjacent portions of the surface or the work, and fluid motor means for rotating said rst mentioned head to leffect the shearing of the flash by said cutter. 4 2. A .ash trimming machine comprising a frame, a head revolubly mounted in `said frame, a chuck on said head for engaging and circularizing the work with an exposed ash bearing surface, a shearing cutter formed of a plurality of overlapping sections relatively movable in a generally axial direction of and corresponding in contour to dilerent portions of said surface, means mounted on said frame for iioating'ly positioning said cutter sections and pressing the same in one direction into contact with said surface, fluid pressure means for yieldably pressing ea-ch section in al transverse direction respectively towards the adjacent portion of said surface, means for rotating said head to shear the flash from the surface, and means on said cutter sections engaging a portion of said surface for'restraining the shearing edges from penetrating beneath said'surface during the shearing of the ash.

3. A ash trimming machine comprising a frame, a head revolubly mounted therein, an expanding chuck carried ``by said head and vadapted to engage and 'circularize` an annular work member having a flash projectingr from its outer surface, fluid operating means mounted on said head for expanding said chuck into engagement'with the work, a shearing cutter formed of a plurality of overlapping sections extending in a generally axial vdirection of and conforming to diierent portions of the contour of thev work, slides for floatingly positioning the respective sections in contact with the `corresponding portions `of the Work surface, uid pressure means for yieldably pressing the respective sections in a transverse direction into contact with Aadjacent portions of the surface of the Work, fluid motor means for rotating said head to effect shearing of the flash, and means on said cutter sections engaging a portion ofl said surface for restraining the shearing edges from penetrating beneath said surface during the shearing of the flash.

4. A flash trimming machine vcomprising a rotary head, a chuck mounted on and co-axial with said head adapted for holding vand circularizing annular work having an exposed concentric ash bearing surface, a shearing cutter conforming to and contacting with the contour of said surface, and provided with means cooperating with said surface to prev-ent cutting by the shearing edge beneath the same, and means for relatively rotating said head and cutter to shear the ash and form a continuation of said surface.

ALFRED H. LEWIS.

REFERENCES CITED The following references are of record in the file of this patent:

Number Number 6 UNITED STATES PATENTS Name Date Gressle Nov. 1'7, 1914 Fiddyment May 11,19201 Kranz June 5, 1923 Theberath Dec. 9, 1924 Brainard May 26, 1925i Theberath Dec. 14, 1926 Tormyn Apr. 29, 1930 Booth June 24, 1939 Hanson Sept. 11, 1934 Grotnes Oct. 9, 1934 Morton Mar. 23, 1943 FOREG PATENTS Country Date Great Britain Dec. 15, 1927 OTHER REFERENCES Popular Mechanics Magazine, page 1050, of

June 1931. 

